Automatic stop mechanism for paper-feeding machines



3 Sheets-Sheet 1,-

(No Model.)

L. HARLOW.

AUTOMATIC STOP MPGHANTSM POP PAPER PPPDTNG MACHINES. 110.446,678. Patented Febn 17,1891,I

(No Model.) 3 Sheets-Sheet 2.

L. HARLOW. AUTOMATIG'STOP MECHANISM FOR PAPER FEBDING MACHINES. No. 446,678. Patented Feb. 17, 1891.

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(No Model.) 3 sheetssheen s.

L. HARLOW.

AUTOMATIC STOP MPGHANISM POR PAPER PEEDING MACHINES. No. 446,678. Patented Feb. 17,1891.

rieten,

LUC/IUS IIARLOIV, (')F IIOLYOKE, MASSACHUSETTS.

AUTOMATIC STOP MECHANISM FOR PAPER-FEEDING MACHINES.

SPECIFICATION forming part. of Letters Patent No. 446,678, dated February 1'?, 18191'. Application filed February 19, 1390. Serial No. 340.983. (No model.)

.To @ZZ whom, it may concern:

Be it known that I, LUCIUS IIARLOW, acitizen of the United States, residing at Holyoke, in the cou nty of Hampden and State of Massachusetts, have invented new and useful Improvements in Automatic Stop Mechanism for laper-Feedin g Machines, of which the following is a specification.

This invention relates to improved contrivances for application in relation to paperfeeding mechanism, the same having for its object the stoppage of the said feeding' mechanism on the feed to or into the same of more than a single sheet of paper at once, or t a wrinkled sheet of paper, also that before said double sheets or wrinkled sheets may be delivered the same may be withdrawn from the feeding mechanism; and the invention consists in the construction and combination of parts,all substantially as will hereinafter more fully appear, and be set forth in the claims.

In the accompanying sheetsl of drawings illustrations are given of mechanism consti- .tuting the stopping appliances for the paperfeeding device.

.Figure l is a side elevation of a sheet-feeding device for a paper-calendering machine, substantially such as is fully shown and described in the Letters Patent of the United States granted to me October l2, 1886, No. 350,741, said feeding device being shown in proximity to a paper-calendering machine which it is intended to feed, and a stop mechanism embodying the essentials of my present invention is shown as combined with said paper-feeding device. Fig. i? is a front elevat-ion of the paper-feeding device and of the stop mechanism shown in Fig. l. Fig'. 3 is an enlarged sectional elevation taken about on the plane indicated by the line 3 3 on Fig. 2. Fig. 4t is a sectional elevation of parts in detail, enlarged, as seen on the section plane indicated by line d 4. on Fig. 2. Fig. 5 is a plan and partial horizontal section of the parts shown in Fig. 4r. The parts of said figure, which are shown in section, are taken ou the planes indicated by the lines 5 5, Fig. et.

Proceeding to describe the stop mechanism embodied in Figs. l and 2 and other detail .views next following, A represents the paperfeeding device above mentioned as constitutling the sub ject1natter of my aforesaid Letters Patent; and Il represents a calenderingmachine, the sheets of paper to be operated upon by said calender being fed into the ac tion of the carrying-tapes a b atc in advance of the work-.table C.

D represents the drivin g-shaft for the paperfeeder, there being supported loosely thereon the belt-.driven pulley E g and CZ represents a splined elutch-collaradapted to slide upon said shaft D, being, however, constrained against rotation thereon, and a projection CZ of said. collar is adapted, when the collar is properly slid, to have an engagement with a projection e, fixed on the hub of the pulley E.

F represents a shipper-lever pivoted on the frame of the paper-feeder or other suitable support, the short arm of which engages the annular groove in the clutch-collar d, and, as

usual in the operation of this common form of power-shipping devices, swinging the lever in one direction insures the interlocking of the driving-pulley with the driving-.shaft D of the paper-feeder, while swin ging' said lever in the reverse direction unclutches, insuring a cessation of the rotation of the shaft D. The belt G passing around the fast pulley II, and also around or in engagement with one or more of the supporting-rolls f for the carrier-tapes of the paper-feeder, imparts the proper rotary motion to said taperollers, whereby the forward travel thereof for feed of paper thereby is insured. In Fig. 2 this driving-belt G is shown in face view in full lines at one side of the paper-feeder, but in Fig. l this belt G is indicated by the heavy broken line, it being deemed expedient to thus indicate the course of said .lriving-belt in an effective manner.

Adjacent to the plane of travel of the sheetof paper in the fcedinginechanisin I provide two rolls, one g of which is mounted for rotation in Xed bearings 20, while the other roll h is supported upon a bearing which ismovable toward and away from the first-named roll g. A movable bearing for roll 7a, as shown in the drawings, consists of a lever j, which by a suitable portion thereof is pivotally hung on a part or extension of the supportingframe.

7.; represents a rocker-shaft, having a radi IOO ally-extended arm 1i, to the extremity of which one end of the connecting-rod m is secured, the other end of said rod being pivotally connected to the roll -carrying lever The rocker-shaft 7a has a normal tendency to rock, so as to swing its radial arm t' forwardly or toward the front of the feeder, whereby the carrying-lever j is correspondingly swung and the forward periphery of the roller 7L maintained against the periphery of its fellow-roll g, which contact is coincident with the plane of the contacting inner faces of the carriertapes a l2, (it being understood that said rollers g 7L are located in one of the spaces between the edges of two sets of the carrier- The tendency toward forward tapes a b.) rocking movement of said shaft 7i; is imparted by applying a weight 22 to a radial arm 23, affixed to said rocker-shaft. It will be understood that the roller 71,1novably supported, substantially as described, in relation to its fellow-roller and located with its contacting peripheral portion in the plane of the paperfeed, will, o n the passage of a single sheet of paper between said two rollers, be outwardly moved a slight distance, moving its carryingsupport therewith a relatively corresponding distance, and on the passage between said two rollers of two or more sheets of paper at once, or of a sheet of paper which, due to a defective condition-as, for instance, occasioned by wrinkles, creases', or kinks there nthe said movable roller and its carrying-support will be moved a correspondingly greater distance; and it will be clearly understood that whatever of movement is imparted to the carrying lever or support for roller 7L will be imparted in a proportionately increased degree to the radial arm 2', and in a proportionately corresponding degree to the rockershaft c; and it will be further understood that having thus imparted a rocking motion to said shaft such motion may be in a variety of ways communicated to the power-shippin g device.

As particularly shown in the mechanism illustrated by the drawings, said mechanism comprises a radial arm l, aflixed on said rocker-shaft 7.5, and which is preferably even longer than the radial arm il, to the upper end of which a pawl-rod 'a is attached, said pawl-rod by its forward end playing in a vertical slot 24, formed in a horizontal block 25, affixed to the frame of the machine. The extremity of said pawl is supported on the solid part of said block, which forms the base of said slot 2l. 26 represents a horizontal hole formed through said block 25, angularly intersect-ing the slot 2i; and 27 represents a slide-rod, which is adapted to play through said hole 26, and a normal tendency is imparted to said rod 27 to move inwardly by means of the weighted cord 28, which is suitably guided as by passage over pulley 29, and which has its end secured to said slide-rod 27, or a proper angular extension thereof, as seen in Fig. 2. Said slide-rod is, however, prevented under normal conditions from sliding inwardly through said hole 26 further than to said slot 2i, as from the position of the pawl n, the extremity of which lies either in whole or in part across and covering the area of said hole, such inward slide is prevented and this relation of the extremity of said pawl with the slideway or hole for said rod 27 is illustrated in the enlarged views, Figs. el and 5.

p represents an arm, by one end pivoted on the supporting-frame 'of the feeder and adapted to be swung horizontally and laterally to said frame. Below said arm p an angular arm q by its elbow is pivoted, the vertical arm 32 of said angular lever serving as a movable support for said swinging arm p, while to the other arm 33 is pivoted a movable supporting-brace 34:, the object of which is to maintain the angular lever q in the position seen in Fig. l, which is its position for supporting the arm p horizontally, which latter arm supports the weight r, and a cord or other flexible connection s is by its lower end connected to said weight lr, its upper portion passing upwardly over a sheave 35, which is mounted on an overhead support, and the extremity of said cord thence extending downwardly is connected with the long arm of the power-shipping lever F. A cord 36 is connected to the said pivoted bracesupport of the angular lever q, and it thence passes downwardly to a connection with the weighted cord 2S, one end of which cord 28, as has been hereinabove explained, is conneet-ed to the slide-rod 27, all so that when said slide-rod is held back or in its outermost disposition by the engagement therewith of the sliding pawl n, as illustrated in the drauings, on account of the drawing up of the pending portion of said cord, the cord 36, attached, as stated and shown, to said weighted cord 2S is slack and exerts no draft upon the supporting-brace 34, and therefore as long as said pawl a remains in a position to prevent the inward slide of the rod 27 no change in position of brace 34 or leverq will be effected and the support for the weight r (constituted by the horizontal maintenance of arm p) will remain intact; but assuming that two or more sheets of paper pass through the feed-tapes and to and between the rolls g and 7L, the latter roll is forced rearwardly away from the roll g, its carrying-lever also correspondingly swinging and causing a rock of the shaft k, and through the arm l pawl. a is drawn sufficiently rearward as to carry its end back away from the end of slide-rod27, leaving the hole 26 through said block entirely unobstructed, and under the action of the weight the cord 28 draws said rod 27 laterally inward, and the weighted end of the cord moving downwardly draws the cord 3G taut, and exerting a draft thereon draws the supportingbrace 34 by its free end out from its supporting engagement upon the side of the frame,

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megeve permitting the angular lcverq to swing, positive swinging motion being impar-ted thereto either from the gravity of the arm or by the draft exerted bythe tautened cord 3G through the brace 34. The arm p, swinging downwardly, permits the weight r to slide ot'f and to exert its force through cord .s to swing thc shipper-lever. rlhe travel of the carryingtapes of the paper-feeder having been stopped, the duplicated sheets are removed from between the carrying-tapes, which may readily be done by causing a reverse travel of said carrying-tapes by moving the belt G in a reverse direction by hand. After the double sheets have been removed from the feeding mechanism, the parts are replaced in their positions, as respectively shown in Figs. l and 2, when the parts will run without cessation until again caused to stop by the automatic stop mechanism.

It will be seen in Fig. l that the pawl yn comprises two sections 39 and 40, one of which is longitudinally extensible or adjustable on the other by means of the clamping-block t and the set-screws 42. By this provision the described mechanism may be rendered operative under any given movement of the roller 71/ away from the one g. Therefore if after the parts have been adjusted for the feeding of thin paper and it is desired to next feed very much thicker paper the section 40 of the pawl is adj usted so that the pawl extremity lies further across the end of the slide rod 27, whereby whatever movement may be imparted by the mechanism described to the pawl will not be sufficient to carry it free from the end of the slide rod, and yet the adjustment is to be such that two of the sheets or a wrinkled sheet passing between rolls g 7L will, through the intervening connections, move the pawl entirely out of engagement with the slide rod. By providing a suitable abutment for the movable carrying-support for the roll h-such, for instance, as is shown in Fig. S-the roll 7i may be normally held so as to present its periphery at a distance from the periphery of the roll g, exactly corresponding to the thickness of the sheets of paperintended to be fed. Of course it will be understood that under the provision of this stop device for the roll-carrying support the pawl n will have no movement with relation to the end of the slide rod 27, except when it is given such a movement as to entirely free it from engagement with the slide rod, while in the arrangement of the parts first described, wherein the rolls are normally in peripheral contact, on each passage between them of a sheet of paper of the proper thickness the pawl n will be moved, but only sufficiently to carry its extremity partially across the end of rod 27, said pawl only movn ing far enough to be entirely free from engagement with said rod when paper of unusual or undue thickness is carried between therolls g and 7i.. The abutment above mentioned, as shown in Fig. S, and which is indicated in said figure by the letter it, maybe adjustable, as shown, whereby the distance between the peripheries of the rolls g and 7L may be made to correspond to the thickness of any paper which it is desired to feed. The employment of this abutment is by no means essential; but its use may be elected, as preferable in some instances.

It is of course not necessary that this stop mechanism for paper-feeding devices be understood as limited to a paper-feeder essentially comprising carriertapes, for to one conversant with paper-feeders atlarge-it will be apparent that the invention is readily applicable to other classes of paper-feeders.

l. The combination, with the power-ship ping device of a paper-feeder, of a pair of paper-bearing` rolls, one thereof having provided therefor a movable bearing-support, a slid e-pawl and connections between same and said movable roll-support, whereby from the vibration of said movable roll-support a moVement may be imparted to said pawl, a sliderod, and mechanism intervening between j same and said power-shipping device, said pawl constituting a temporary obstruction to the movement of said rod, and all whereby on the freedom of and movement of said rod through the mechanism connected thereto and intervening between same and said power-shipping device the latter will be operated, forthe purpose set forth.

2. The combination, with a po wer-shipping device of a paper-feeding machine, of' a pair of rolls arranged in the plane of the feed of the paper,and a leversuitablypivotallyhung constituting the support for one of said rolls, whereby it is movable toward and from its fellow, a rock-shaft provided with a radial arm which is connected to said lever, a suitable part, as the block 25, provided with a guiding-hole 26, a slide-rod 27, movable in and through said hole, another radial arm on said rock-shaft having connected thereto a sliding pawl which is guided to move across and away from said guide-hole and to serve as a stop against the free passage of said slide-rod, a weight-carrying cord attached to said power-shipping device, and a movable device for maintaining said weight in a suitably elevated position, a connection by one portion thereof engaged to said movable wei ght-suppoitin g device and by another portion connected to said slide-rod, all whereby through the primary action of an undue paper thickness on said movable roll, on the resultant movement of said slide-pawl to permit the passage thereby of said slide-rod, the latter will through its connection with the supports for the weight insure a movement thereof to free said weight to its normal action upon the shipping device.

8. In a stop mechanism for paper-feeding machines, the combination, with the rock- IOO Chine, said pawl constituting zi temporaryobstruction to the movement of said rod, as and 1o for the purpose set forth.

LUCIUS HARLOW.

Witnesses:

H. A. CHAPIN, WM. S. BELLOWS. 

